When you reach level 12 all mobs, chests, boxes and barrels will gain a chance to drop Grade 1 Mods, even in the dungeons surrounding The Refuge.

Each item has 3 possible mods it can accept (randomly assigned when you receive the item) and all items have 3 sockets regardless of item level or quality.

When looking at an item mouseover, mod effects listed in grey are open and unused, while gold indicates a socketed mod.

Blank Mods come in all 10 grades but cannot be purchased from the Electrum Shop. They do sometimes appear in the Mystery Shop but come mostly from rewards, such as the Consumption Reward for spending 9900 which gives you a Grade 5 Blank Mod. A Blank Mod can be substituted for one any-shape mod of the three you need to merge mods. The Grade needs to match and you cannot use 2 blanks in the same Merge.

Note: Each increase in grade is double or less the value of the previous grade. Since it takes three mods to merge each merge is actually losing value. For this reason, it is very important to keep every mod socket filled before you start merging mods if you want to maximize Power.